Investigators working for Jeff Bezos have reportedly concluded that the intimate text messages published by the National Enquirer were leaked by the brother of the Amazon boss’s mistress. The team, led by investigator Gavin de Becker, believed that Michael Sanchez – the brother of Mr Bezos’s girlfriend, Lauren Sanchez – gave the texts to the tabloid, several media reports have suggested. Mr Sanchez has previously denied he was involved in leaking the material and this weekend he attacked the Amazon founder.